When eating healthy, flexibility often works best, says Joyce Meng, MD, assistant professor at the Pat and Jim Calhoun Cardiology Center at UConn Health. If you like to follow a strict diet plan, go for it. If not, it's OK. "Find what works for you."

Exercise Every Day

Aim for 2 and a half hours of moderate activity, like brisk walking or dancing, every week. If you're OK with vigorous exercise, stick to 1 hour and 15 minutes a week of things like running or playing tennis. Add a couple of days of strength training, too.

If you're busy, try short bursts of activity throughout the day. Walk often. A good target is 10,000 steps a day. Take the stairs. Park your car far away from your destination.